April 2013
Intermediate to advanced
264 pages
7h 44m
English
Content preview from The Modern WebBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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The canvas Element
The canvas element is so named because, like a blank canvas, it’s there to be drawn on. The drawing is done with JavaScript using a dedicated API, creating a tailor-made bitmap graphic. And it really is like a painter’s canvas in that once you’ve drawn on it, you can’t then manipulate the things you’ve drawn. They are not objects like SVG elements, just pixels on the screen; you can only draw over them.
The basic setup is incredibly simple: Add a canvas element to your markup—perhaps with a unique id that will make it a little easier to reference—with size attributes and fallback content for browsers that don’t support canvas (or JavaScript):
<canvas id="canvas" height="400" width="800"> <p>Sorry, your browser doesn’t support ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.